/Engine/Source/Editor/PropertyEditor/Public/PropertyEditorClipboard.h
Will return true if the tag is specified and exists. If the tag doesn't exist, Dest will be populated with the untagged clipboard contents.
static bool ClipboardPaste ( [FString](API\Runtime\Core\Containers\FString) & Dest, [FName](API\Runtime\Core\UObject\FName) Tag )